JP2016062541A - Power source control device, control method of the same, control program thereof, and electronic device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power source control device and a control method of the power source control device, a control program, and an electronic device including the power source control device that supply a stable power to a load to cause the load to execute a desired function excellently, and attain power consumption of device.SOLUTION: A power source control device has: a computation circuit unit 10 that has a normal mode and a stand-by mode; a power source supply circuit 20 that supplies a drive voltage to a sensor 30 on the basis of a control signal from the computation circuit unit 10. After transmitting a specific command signal to the power source supply circuit 20, the computation circuit unit 10 is configured to transit to the stand-by mode not outputting the specific command signal from the normal mode, and is set so that a supply of the drive voltage to the sensor 30 is maintained even after the computation circuit unit 10 transits to the stand-by mode. Accordingly, an ON-operation of the sensor 30 is continued even while the computation circuit unit 10 is in the stand-by mode, and a usage state of an electronic device is detected to return the computation circuit unit 10 to the normal mode.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a power supply control device applied to an electronic device having a built-in power supply, a control method therefor, and a control program.

  In recent years, various products (referred to as “wearable devices” for convenience) that can be worn on the human body to record and analyze various data during exercise such as running, cycling, swimming, trekking, and daily life. Developed and marketed. Portable information communication devices such as mobile phones, smart phones (high-function mobile phones), and tablet terminals are also widely used. Such a device has a built-in battery power supply and performs a desired function by supplying power to each functional unit. On the other hand, the wearable devices and portable information devices described above have been improved in functionality in recent years by mounting various sensors and communication functions. For this reason, power consumption tends to increase, and there is a problem that the drive time of a device incorporating a battery power supply is shortened. Various techniques have been devised to improve such problems.

  For example, in Patent Document 1, in a portable device, a FET (Field Effect Transistor) is switched on and off by a Sensor Enable signal output from an MCU (Micro Controller Unit) to control the supply of power Vcc to the sensor. The configuration is described. Here, Patent Document 1 discloses that the MCU is shifted to a sleep state to suppress power consumption during a period in which sensing is not performed in accordance with an operation state of a sensor that periodically performs sensing. Yes.

JP 2005-284596 A

  In the power supply control method described in Patent Document 1 and the like described above, in order to further suppress power consumption in the MCU, it is necessary to shift the MCU functions to a sleep state in which most functions are suspended. However, at this time, if the sensor enable signal is not supplied from the MCU to the FET or if the signal level is indeterminate, the supply state of the power supply Vcc to the sensor becomes unstable. There is a problem that the on / off operation of the FET is affected and the sensor does not normally perform the sensing operation. For this reason, even in order to suppress power consumption, it has not been possible to enter such a dormant state. Such a problem is a problem that may similarly occur in arithmetic processing devices such as an MCU, a CPU (central processing unit), and an MPU (microprocessor) that have a power saving mode in addition to the normal operation mode. Further, as in Patent Document 1, the present invention is not limited to supplying power Vcc to the sensor, but may be supplying predetermined power to another load such as a radio communication (RF) circuit, for example. It is a problem that occurs.

  Accordingly, in view of the above-described problems, the present invention provides a power supply control device capable of realizing power saving of a device while supplying a stable power to a load and executing a desired function satisfactorily. It is an object to provide a control method, a control program, and an electronic device including the power supply control device.

The power supply control device according to the present invention includes:
An arithmetic circuit unit that executes a predetermined operation by switching between the first operation mode and the second operation mode in which power consumption is less than that of the first operation mode;
A power supply circuit for supplying a drive voltage to a load based on a control signal output from the arithmetic circuit unit;
Have
The arithmetic circuit unit shifts from the first operation mode to the second operation mode after transmitting the specific control signal to the power supply circuit, and in the second operation mode, the specific control signal Is not output,
The power supply circuit maintains the supply of the drive voltage to the load and operates the load based on the specific control signal while the arithmetic circuit unit is in the second operation mode. It is characterized by continuing the state.

The electronic device according to the present invention is
An arithmetic circuit unit that executes a predetermined operation by switching between the first operation mode and the second operation mode in which power consumption is less than that of the first operation mode;
A detection unit for detecting a signal related to a user's input operation;
A power supply circuit that supplies a predetermined drive voltage to the detection unit based on a control signal output from the arithmetic circuit unit;
The arithmetic circuit unit shifts from the first operation mode to the second operation mode after transmitting the specific control signal to the power supply circuit, and in the second operation mode, the specific control signal Is not output,
Based on the specific control signal, the power supply circuit maintains the supply of the drive voltage to the detection unit while the arithmetic circuit unit is in the second operation mode. The operation state is continued.

The control method of the power supply control device according to the present invention includes:
An arithmetic circuit unit that executes a predetermined operation by switching between the first operation mode and a second operation mode that consumes less power than the first operation mode, and a control signal that is output from the arithmetic circuit unit And a power supply circuit for supplying a drive voltage to the load,
After the specific control signal is transmitted from the arithmetic circuit unit to the power supply circuit, the arithmetic circuit unit is shifted from the first operation mode to the second operation mode to identify the arithmetic circuit unit. The control signal is not output,
Based on the specific control signal, while the arithmetic circuit unit is in the second operation mode, the operation state of the load is maintained by supplying the drive voltage from the power supply circuit to the load. It is characterized by continuing.

The control program of the power supply control device according to the present invention is:
A computer including an arithmetic circuit unit that performs a predetermined operation by switching between a first operation mode and a second operation mode that consumes less power than the first operation mode,
Based on the control signal output from the arithmetic circuit unit, after causing the power supply circuit that supplies the drive voltage to the load to transmit the specific control signal, the arithmetic circuit unit is moved from the first operation mode to the first operation mode. 2 to make the arithmetic circuit unit not to output the specific control signal.
Based on the specific control signal, while the arithmetic circuit unit is in the second operation mode, the operation state of the load is maintained by supplying the drive voltage from the power supply circuit to the load. It is characterized by continuing.

  ADVANTAGE OF THE INVENTION According to this invention, the power saving of an apparatus can be implement | achieved, supplying the stable electric power with respect to load and performing a desired function favorably.

It is a figure which shows 1st Embodiment of the power supply control apparatus which concerns on this invention. It is a figure for demonstrating the operation mode of the arithmetic circuit part applied to the power supply control device which concerns on 1st Embodiment. It is a figure which shows the specific soft example for demonstrating the effect of 1st Embodiment. It is a figure which shows 2nd Embodiment of the power supply control apparatus which concerns on this invention. It is a schematic block diagram which shows an example of the electronic device provided with the power supply control apparatus which concerns on this invention. It is a schematic perspective view which shows the specific example of the electronic device provided with the power supply control apparatus which concerns on this invention.

  Hereinafter, a power supply control device, a control method thereof, a control program, and an electronic apparatus including the light source device according to the present invention will be described in detail with reference to embodiments.

<First Embodiment>
(Power control device)
FIG. 1 is a diagram showing a first embodiment of a power supply control device according to the present invention. FIG. 1A is a schematic block diagram illustrating a configuration example of a power supply control device, and FIG. 1B is a timing chart illustrating an example of a control method in the power supply control device.

  As shown in FIG. 1A, for example, the power supply control device according to the first embodiment is generally used for driving an arithmetic circuit unit 10 including an arithmetic processing unit such as a CPU and an MPU, and a load such as a sensor 30. And a power supply circuit 20 that supplies a power supply voltage (drive voltage).

The arithmetic circuit unit 10 controls the operating state of the power supply circuit 20 by transmitting a predetermined control signal from an output terminal (for example, GPIO; General Purpose Input / Output) to at least the power supply circuit 20. The arithmetic circuit unit 10 receives a detection signal acquired by the sensor 30 via an input terminal (for example, GPIO), and executes predetermined data processing. Here, the arithmetic circuit unit 10 and the power supply circuit 20 are interfaces of a synchronous serial communication standard such as I ² C (Inter-Integrated Circuit) (hereinafter referred to as “synchronous serial I / F” for convenience). Connected through. This synchronous serial I / F has two signal lines: a signal line that transmits a clock signal for synchronization (synchronization signal) and a signal line that transmits a command signal. As a result, the arithmetic circuit unit 10 controls the supply state (supply or cutoff) of the drive voltage to the sensor 30 in the power supply circuit 20 while transmitting a synchronization signal for synchronization with the power supply circuit 20. Send and receive command signals.

  In addition, the arithmetic circuit unit 10 performs a normal mode, a stop mode, and a standby mode according to specifications, settings, operating states, and the like of an electronic device (which will be described in detail later) on which the power supply control device according to the present embodiment is mounted. It is configured to perform switching operations. Here, in the normal mode, the arithmetic circuit unit 10 executes various functions constantly or continuously with normal power consumption (in other words, with specified power without reducing power consumption) (normal operation). . In the stop mode, the arithmetic circuit unit 10 performs an operation (low power consumption operation) in a state where power consumption is reduced by suspending functions other than the main functional units. In the standby mode, the arithmetic circuit unit 10 pauses most of the functions including the main functional units, executes only the minimum necessary functions, and operates with further reduced power consumption (low power consumption operation). I do. The standby mode is also called a sleep mode, a power saving state, a hibernation state, or the like. The operation mode in the arithmetic circuit unit 10 will be described in detail later.

  The power supply circuit 20 is a power integrated circuit (IC) such as an LDO (Low Drop Out) regulator, and is suitable for driving a load such as a sensor 30 using a power supply voltage supplied from a battery power supply (not shown). The drive voltage is converted into a predetermined drive voltage and supplied. Here, the power supply circuit 20 holds the synchronization state with the arithmetic circuit unit 10 by receiving the synchronization signal included in the control signal transmitted from the arithmetic circuit unit 10 via the synchronous serial I / F described above. Meanwhile, the supply state (supply or cutoff) of the drive voltage to the sensor 30 is controlled by receiving a command signal included in the control signal. In particular, in the present embodiment, the power supply circuit 20 performs a predetermined operation to the sensor 30 based on a specific command signal transmitted from the arithmetic circuit unit 10 while the arithmetic circuit unit 10 is in the standby mode. Maintain supply of drive voltage.

  The sensor 30 is, for example, a sensor means such as an acceleration sensor, a gyro sensor, a geomagnetic sensor, an atmospheric pressure sensor, a temperature / humidity sensor, a pulse sensor, a heart rate sensor, a positioning sensor using a GPS (Global Positioning System), or the like. Based on the drive voltage supplied from the power supply circuit 20, the positioning means outputs a detection signal acquired by executing a predetermined sensing operation to the arithmetic circuit unit 10.

(action mode)
Next, the operation mode in the arithmetic circuit unit 10 described above will be specifically described.
FIG. 2 is a diagram for explaining an operation mode of the arithmetic circuit unit applied to the power supply control device according to the present embodiment. FIG. 2A is a table showing specific examples in each operation mode of the arithmetic circuit unit, and FIG. 2B is a conceptual diagram showing an operation state of the arithmetic circuit unit in the stop mode. ) Is a conceptual diagram showing an operation state of the arithmetic circuit unit in the standby mode.

  Among the operation modes executed by the arithmetic circuit unit 10, in the normal mode, as shown in the table of FIG. 2A, all the functional units of the arithmetic circuit unit 10 consume normal current, for example, about 200 μA. Perform the action. In this normal mode, the signal level at the output terminal (GPIO) connected to the power supply circuit 20 is maintained at the signal level output (or transmitted) at the present time or immediately before.

  In the stop mode, as shown in the table of FIG. 2A, for example, a current of about 20 μA is consumed, the main functional units of the arithmetic circuit unit 10 maintain normal operation, and the other functional units are suspended. Perform low power consumption operation. Specifically, for example, as shown in FIG. 2B, the operation in the internal memory 12 such as a memory (SRAM) or a register provided in the arithmetic circuit unit 10, the internal power supply circuit 14 such as an LDO, or the arithmetic circuit unit 10. The main functional units such as the INT functional unit 16 that receives a signal related to the interrupt of the signal and the WKUP functional unit 18 that receives a signal related to the return of the operation mode in the arithmetic circuit unit 10 are in an operation state equivalent to the normal mode (normal Operation). In addition, functional units (not shown) other than the main functional units are set in a dormant state. As a result, in the stop mode, the data stored in the internal memory 12 in the normal mode is retained, and the signal level at the output terminal (GPIO) connected to the power supply circuit 20 is output at the present time or immediately before (or The transmitted signal level is maintained. In this stop mode, the arithmetic circuit unit 10 receives a predetermined interrupt (INT) signal, interrupts the stop mode, and returns to the normal mode.

  In the standby mode, as shown in the table of FIG. 2 (a), for example, a very small current of about 1 μA is consumed, and only the minimum necessary functions of the arithmetic circuit unit 10 perform normal operation. The low power consumption operation in which the functional unit is suspended is executed. Specifically, as shown in FIG. 2C, for example, only the WKUP function unit 18 that receives a signal related to the return from the standby mode to the normal mode in the arithmetic circuit unit 10 has an operation state equivalent to that in the normal mode. The internal memory 12, the internal power supply circuit 14, and the INT function unit 16 other than the WKUP function unit 18 are set to a sleep state (indicated by hatching for convenience in the drawing). Thereby, in the standby mode, the data stored in the internal memory 12 in the normal mode or the stop mode is erased (reset), and the signal level applied to the output terminal (GPIO) connected to the power supply circuit 20 Is not retained (confirmed). In this standby mode, the arithmetic circuit unit 10 receives the detection signal from the sensor 30 as an interrupt (WKUP) signal, thereby interrupting the standby mode and returning to the normal mode.

  Thus, in the stop mode, at least the main functional units such as the internal memory 12, the internal power supply circuit 14, the INT functional unit 16, and the WKUP functional unit 18 of the arithmetic circuit unit 10 maintain the normal operation state. The stop mode is suitable for executing a fine intermittent operation with a relatively short cycle or an operation with a high execution frequency. In the standby mode, only the WKUP function unit maintains the normal operation state, and most of the other function units are set in the dormant state, and the data stored in the internal memory 12 is not retained. The mode is suitable for performing an intermittent operation with a relatively long cycle or an operation with a low execution frequency. Note that specific examples in these operation modes will be described in detail in the control method of the power supply control device.

(Control method of power supply control device)
Next, a control method of the power supply control apparatus having the above-described configuration will be described.
In the power supply control device having the above-described configuration, the arithmetic circuit unit 10 switches between the normal mode and the stop mode, for example, at a timing set by an application being executed or a timing based on a user operation, Switch between normal mode or stop mode and standby mode. Here, a series of processing operations shown below is realized by executing a predetermined algorithm program in the arithmetic circuit unit 10.

Specifically, when the arithmetic circuit unit 10 executes a specific application and executes a sensing operation with a relatively short cycle (for example, at intervals of 1 second) by the sensor 30, for example, the timing chart of FIG. As shown in the figure, first, the arithmetic circuit unit 10 is in the normal mode and transmits a synchronization signal to the power supply circuit 20 via a synchronous serial I / F such as I ² C, and also sends an H (high) level command signal. Send. As a result, a predetermined drive voltage is supplied from the power supply circuit 20 to the sensor 30, and the sensor 30 is turned on. The detection signal acquired by the sensor 30 is received at a predetermined cycle by the arithmetic circuit unit 10 and stored in a memory unit (not shown), for example. Here, the arithmetic circuit unit 10 reduces power consumption by shifting to the stop mode for a period from the timing of receiving the detection signal acquired by the sensor 30 to the timing of receiving the next detection signal (for example, after 1 second). Perform power operation.

  That is, in the stop mode, as shown in FIGS. 2A and 2B, the function units other than the main function units of the arithmetic circuit unit 10 are set to the sleep state, and the power consumption is reduced. In the stop mode, since the signal level at the output terminal (GPIO) of the arithmetic circuit unit 10 is held, the command signal transmitted from the arithmetic circuit unit 10 to the power supply circuit 20 holds the signal level in the normal mode. Then, a predetermined drive voltage is supplied from the power supply circuit 20 to the sensor 30, and the sensor 30 continues to be turned on. In this stop mode, the arithmetic circuit unit 10 measures (counts) the time elapsed from the timing (the transition timing to the stop mode) at which the detection signal acquired by the sensor 30 is received in the normal mode. The next detection signal is received by returning to the normal mode at the next timing (or the timing immediately before) at which the detection signal acquired by the above is received. Here, in the stop mode, since the main functional units of the arithmetic circuit unit 10 maintain the normal operation state, the transition of the arithmetic circuit unit 10 from the normal mode to the stop mode, and from the stop mode to the normal mode. Return to is done quickly.

  As described above, when performing a fine intermittent operation with a relatively short cycle or an operation with a high execution frequency, the operation is performed by setting the period between operation timings in the normal mode to the stop mode (substantially). By repeating the normal mode and the stop mode alternately), the operation circuit unit 10 is operated with low power consumption, and the operation mode of the operation circuit unit 10 is switched (shifted) without causing a processing delay or the like. A load such as 30 can be favorably operated.

  Next, when the arithmetic circuit unit 10 has been set by an application being executed, or when a state in which an electronic device in which the power supply control device is mounted is not used (non-use state) continues for a predetermined time or longer. The arithmetic circuit unit 10 shifts from the normal mode or the stop mode to the standby mode. Here, the non-use state of the electronic device is, for example, a state in which the device is not lifted, a specific vibration, impact, inclination, or the like is not applied, or a switch operation is not performed by the user, For example, the arithmetic circuit unit 10 makes a determination based on a detection signal output from a sensor 30 having an acceleration sensor or the like, an operation switch (not shown), or the like. When the arithmetic circuit unit 10 shifts from the normal mode or the stop mode to the standby mode, for example, as shown in the timing chart of FIG. 1B, first, the arithmetic circuit unit 10 prior to the transition to the standby mode. Then, a specific command signal is transmitted to the power supply circuit 20 via the synchronous serial I / F. Thereby, even after the arithmetic circuit unit 10 shifts to the standby mode, the power supply circuit 20 causes the sensor 30 to receive a predetermined signal regardless of the presence or absence of the control signal (command signal) transmitted from the arithmetic circuit unit 10 and its signal level. Is set to maintain the state of supplying the drive voltage. Here, prior to the transition to the standby mode, the specific command signal transmitted from the arithmetic circuit unit 10 to the power supply circuit 20 is, for example, an H (high) level or an L (low) level having a certain signal width. A series of signal groups in which a plurality of unit signals are arranged serially (continuously) is applied. For example, FIG. 1B shows a case where a signal group in which four signals “L”, “H”, “L”, and “L” are serially transmitted is transmitted as a specific command signal (voltage holding command). Yes. The specific command signal is not limited to the example shown in FIG. 1B, and a signal group in which an arbitrary number of unit signals are serially arranged can be applied. When the power supply circuit 20 receives the specific command signal transmitted from the arithmetic circuit unit 10, the power supply circuit 20 confirms that the specific command signal is received by the arithmetic circuit unit 10 via the synchronous serial I / F. Acknowledgment signal ACK (Acknowledge) is transmitted. Thereby, the arithmetic circuit unit 10 shifts to the standby mode and executes the low power consumption operation until the timing set by the application or until the state in which the electronic device is used is detected.

  That is, in the standby mode, as shown in FIGS. 2A and 2C, most of the functional units of the arithmetic circuit unit 10 are set to the hibernation state, and the power consumption is further reduced compared to the stop mode. In the standby mode, the signal level at the output terminal (GPIO) of the arithmetic circuit unit 10 is not held (determined), but the sensor is sent from the power supply circuit 20 by a specific command signal transmitted prior to the transition to the standby mode. The state in which a predetermined drive voltage is supplied to the sensor 30 is maintained, and the sensor 30 continues to be turned on even after transition to the standby mode. In this standby mode, the state where the electronic device is used (usage state) is detected by the sensor 30 or the like, and the arithmetic circuit unit 10 receives the detection signal, thereby returning to the normal mode. Here, in the standby mode, since the WKUP function unit 18 of the arithmetic circuit unit 10 maintains a normal operation state, the arithmetic circuit unit 10 uses the detection signal output from the sensor 30 or the like as an interrupt (WKUP) signal. Receive well. In the standby mode, the data stored in the internal memory 12 including the memory (SRAM) and registers is erased (reset), so that it is compared with the reset processing of the internal memory 12 when returning to the normal mode. Although most of the functional units other than the WKUP functional unit 18 that receives an interrupt signal (WKUP) related to the return of the arithmetic circuit unit 10 to the normal mode are set in a sleep state, the arithmetic circuit unit 10 Operates with lower power consumption.

  As described above, when an intermittent operation with a relatively long cycle or an operation with a low execution frequency is executed, the arithmetic circuit unit 10 is further reduced in consumption by moving from the normal mode or the stop mode to the standby mode. A load such as the sensor 30 that outputs an interrupt signal for returning the arithmetic circuit unit 10 to the normal mode can be favorably operated while being operated with electric power.

(Verification of effects)
Next, the effects of the power supply control device and the control method thereof according to the present embodiment will be specifically described with reference to a specific soft example.
FIG. 3 is a diagram illustrating a specific soft example for explaining the operational effects of the present embodiment. FIG. 3A is a schematic block diagram in the comparative example, and FIG. 3B is a timing chart showing the control method. Here, in order to clarify the comparison between the configuration and the control method between the present embodiment and the comparative example, the configuration and the control method equivalent to the present embodiment (see FIG. 1) will be described with the same reference numerals. .

  The power supply control device in the comparative example includes an arithmetic circuit unit 10P and a power supply circuit 20P that supplies a drive voltage to the sensor 30P, for example, as shown in FIG. In such a power supply control device, a predetermined control signal is transmitted from the arithmetic circuit unit 10P to the power supply circuit 20, whereby the drive voltage supply state (supply or cutoff) from the power supply circuit 20 to the sensor 30P is changed. Be controlled. Here, in the comparative example, CE (Chip Enable) having a binary signal level of H (high) and L (low) is applied as the control signal output from the arithmetic circuit unit 10P.

  In such a power supply control device, in the normal mode, as shown in the timing chart of FIG. 3B, for example, the control signal (CE) at the H (high) level from the arithmetic circuit unit 10P to the power supply circuit 20P. Is transmitted, a predetermined drive voltage is supplied to the sensor 30P, and the sensor 30P is turned on. The detection signal acquired by the sensor 30P is received at a predetermined cycle by the arithmetic circuit unit 10P.

  Moreover, in the power supply control device of the comparative example, when executing an intermittent operation with a relatively long cycle or an operation with a low execution frequency as shown in the above-described embodiment, for example, the timing chart of FIG. As shown, a case where the arithmetic circuit unit 10P shifts from the normal mode or the stop mode to the standby mode in order to perform the low power consumption operation will be considered. In this standby mode, the signal level of the control signal (CE) transmitted to the power supply circuit 20P is not held (not fixed) as in the above-described embodiment (FIGS. 2A and 2C). In addition, the functional units other than the WKUP functional unit of the arithmetic circuit unit 10P are set to a dormant state. As a result, the arithmetic circuit unit 10P can be operated with low power consumption, but the signal level of the drive voltage supplied from the power supply circuit 20P to the sensor 30P becomes unstable (becomes undefined), and the sensor 30P. May not turn on (turn off). For this reason, in the standby mode, the state in which the electronic device is used (usage state) cannot be accurately detected by the sensor 30P, and the arithmetic circuit unit 10P cannot return to the normal mode. In order to avoid the occurrence of such problems, it is necessary to adopt a method that avoids the transition to the standby mode and stops until the transition to the stop mode, which consumes less power than the standby mode. There wasn't.

On the other hand, in the present embodiment described above, a specific command signal is sent from the arithmetic circuit unit 10 to the power supply circuit 20 via a synchronous serial I / F such as I ² C prior to the transition to the standby mode. Is set so as to maintain the supply of the predetermined drive voltage to the sensor 30. Thus, even after the arithmetic circuit unit 10 shifts to the standby mode, the sensor 30 continues to be turned on regardless of the presence or absence of the control signal (command signal) and its signal level. While operating with power consumption, the state (usage state) in which the electronic device is used can be satisfactorily detected by the sensor 30, and the arithmetic circuit unit 10 can be accurately returned to the normal mode. Therefore, it is possible to realize power saving of an electronic device including a power supply control device while supplying stable power to a load that executes a predetermined function such as a sensor and executing the function well. .

  In the present embodiment, the sensor 30 is shown as a load that executes a predetermined operation based on the drive voltage supplied from the power supply circuit 20, but the present invention is not limited to this. That is, in the present embodiment, the load continues to be turned on by the drive voltage supplied from the power supply circuit 20 at least in the standby mode of the arithmetic circuit unit 10, and the electronic device including the power control device is used. As long as it includes a sensor, a switch, a wireless communication circuit, etc.

<Second Embodiment>
Next, a second embodiment of the power supply control device according to the present invention will be described with reference to the drawings.
FIG. 4 is a diagram showing a second embodiment of the power supply control device according to the present invention. FIG. 4A is a schematic block diagram illustrating a configuration example of the power supply control device, and FIG. 4B is a table illustrating an operation state of each load in the standby mode. Here, about the structure equivalent to 1st Embodiment mentioned above, the same code | symbol is attached | subjected and the description is simplified.

  In the first embodiment, the case where the power supply circuit 20 controlled by the arithmetic circuit unit 10 supplies a predetermined drive voltage to the single sensor 30 has been described. The second embodiment is characterized in that a drive voltage having a different voltage value is individually supplied to a plurality of loads.

  For example, as shown in FIG. 4A, the power supply control circuit according to the second embodiment is replaced with a power supply circuit 20 composed of a power integrated circuit such as the LDO regulator shown in the first embodiment. , Sensor A32, wireless communication (RF) circuit 34, sensor B36, etc., a composite power supply circuit (PMIC; Power Management IC) for individually supplying a predetermined drive voltage suitable for each drive to a plurality of loads 25. Here, the composite power supply circuit 25 has a configuration in which a plurality of power supply integrated circuits for supplying individual drive voltages to a plurality of loads are mounted on a single integrated circuit.

As in the first embodiment described above, the arithmetic circuit unit 10 transmits a control signal including a synchronization signal and a command signal to the composite power supply circuit 25 via a synchronous serial I / F such as I ² C. In addition, the arithmetic circuit unit 10 receives the detection signal acquired by the sensor A32 and the sensor B36 and the reception signal acquired by the wireless communication circuit 34 via individual input terminals (for example, GPIO), and performs predetermined processing. Perform data processing.

  The composite power supply circuit 25 controls the supply state of the drive voltage to the sensor A 32, the wireless communication circuit 34, and the sensor B 36 based on the command signal included in the control signal transmitted from the arithmetic circuit unit 10. In particular, in the present embodiment, the composite power supply circuit 25 determines the individual drive voltages for the sensor A32, the wireless communication circuit 34, and the sensor B36 in the standby mode based on a specific command signal transmitted from the arithmetic circuit unit 10. Set supply or shutoff collectively.

  The wireless communication circuit 34 is connected to a sensor device, an information communication device, a personal computer or the like (hereinafter referred to as “external device”) provided outside the electronic device including the power supply control device according to the present embodiment. It is a communication interface unit that transmits and receives various data and signals by a predetermined wireless communication method. In the wireless communication circuit 34, for example, Bluetooth (registered trademark) communication, Bluetooth slow energy (Bluetooth (registered trademark) low energy (LE)) communication, Wi-Fi (wireless fidelity (registered trademark)) communication, etc. Various wireless communication systems are applied. Based on the drive voltage supplied from the power supply circuit 20, the wireless communication circuit 34 transmits / receives various data to / from an external device and outputs the acquired reception signal to the arithmetic circuit unit 10.

As a control method of the power supply control device having such a configuration, a control method equivalent to that of the first embodiment described above can be applied in the normal mode and the stop mode. That is, the arithmetic circuit unit 10 transmits an H (high) level command signal to the composite power supply circuit 25 via a synchronous serial I / F such as I ² C, whereby the sensor A32 and the wireless communication are transmitted from the composite power supply circuit 25. A predetermined drive voltage is individually supplied to each of the circuit 34 and the sensor B36, and the sensor A32, the wireless communication circuit 34, and the sensor B36 are turned on. The detection signal acquired by the sensor A32 and the sensor B36 and the reception signal acquired by the wireless communication circuit 34 are received by the arithmetic circuit unit 10 via individual input terminals (for example, GPIO), and predetermined data processing is performed. Is executed.

  On the other hand, in the standby mode in the power supply control device according to the present embodiment, the arithmetic circuit unit 10 transmits a specific command signal to the composite power supply circuit 25 via the synchronous serial I / F prior to the transition to the standby mode. Thus, even after the arithmetic circuit unit 10 shifts to the standby mode, a state in which predetermined drive voltages are individually supplied from the composite power supply circuit 25 to each of the sensor A32, the wireless communication circuit 34, and the sensor B36 is maintained. Here, a series of signal groups in which a plurality of unit signals having a predetermined signal level are arranged in series are applied to the specific command signal, as in the first embodiment described above. In particular, in the present embodiment, the composite power supply circuit 25 executes any one of a plurality of preset load operation states in the standby mode by receiving a specific command signal. Specifically, for example, as shown in the table of FIG. 4B, the plurality of load operation states are a state in which the driving voltage is supplied only to the sensor A32 and the on-operation is continued, There are various states such as a state in which the driving voltage is supplied to the wireless communication circuit 34 and the on operation is continued, and a state in which the driving voltage is supplied to the sensors A32 and B36 and the on operation is continued. Have. Each of these load operation states is set in association with individual specific command signals having different signal levels and arrangements of unit signals included in the command signal. Therefore, the composite power supply circuit 25 executes the corresponding load operation state based on the signal level and arrangement of the unit signals included in the received specific command signal. In this standby mode, the use state of the electronic device is detected by any one of the sensor A32, the wireless communication circuit 34, and the sensor B36 that are continuously turned on, and the detection signal and reception signal are interrupted (WKUP) signal. Is received by the arithmetic circuit unit 10 to return to the normal mode.

  Thus, in the present embodiment as well, as in the first embodiment described above, by transmitting a specific command signal from the arithmetic circuit unit 10 to the composite power supply circuit 25 prior to the transition to the standby mode, Even after the arithmetic circuit unit 10 shifts to the standby mode, the supply of a predetermined drive voltage to the sensor A32, the wireless communication circuit 34, and the sensor B36 is maintained, and the ON operation is continued. Thereby, while the arithmetic circuit unit 10 is operated with sufficiently low power consumption in the standby mode, the use state of the electronic device is detected well by the sensor A32, the wireless communication circuit 34, and the sensor B36, and the arithmetic circuit unit 10 is normally operated. Can return to mode. Therefore, it is possible to realize power saving of an electronic device including a power supply control device while supplying stable power to a load that executes a predetermined function such as a sensor and executing the function well. .

  In the present embodiment, the specific command signal transmitted from the arithmetic circuit unit 10 to the composite power supply circuit 25 prior to the transition to the standby mode causes the sensor A32, the wireless communication circuit 34, the sensor B36, etc. in the standby mode. Which of a plurality of loads is turned on is set. Therefore, the operation state of each load in the standby mode can be arbitrarily set from a plurality of load operation states set in advance by changing a specific command signal, and the specifications of the electronic device on which the power supply control device is mounted And function settings can be made more advanced (various).

In each of the above-described embodiments, a synchronous serial I / F such as I ² C is shown as an interface for connecting the arithmetic circuit unit 10 and the power supply circuit 20 or the composite power supply circuit 25. It is not limited to. That is, the control signal for controlling the supply state of the drive voltage to the load in the power supply circuit 20 or the composite power supply circuit 25 is transmitted and received while synchronizing between the arithmetic circuit unit 10 and the power supply circuit 20 or the composite power supply circuit 25. An interface having another communication standard may be used as long as it can be used.

<Application example of power control device>
Next, an example of an electronic apparatus provided with the power supply control device according to the present invention will be described with reference to the drawings.
FIG. 5 is a schematic block diagram illustrating an example of an electronic device including the power supply control device according to the present invention. FIG. 6 is a schematic perspective view showing a specific example of an electronic apparatus provided with the power supply control device according to the present invention.

  As shown in FIG. 5, for example, the electronic device DVC provided with the power supply control device according to the present invention is roughly divided into two sets of arithmetic circuit units 100 and 200 having different processing capabilities, and is displayed by the arithmetic circuit unit 100. A display panel 310 including a display panel 310 whose state is controlled, a display panel 320 including a display panel 320 whose display state is controlled by the arithmetic circuit unit 200, a light source unit 400 disposed on the back side of the display unit 300, and a power supply unit (Power supply circuit) 500. Here, the arithmetic circuit unit 100 or the arithmetic circuit unit 200 corresponds to the arithmetic circuit unit 10 shown in the above-described embodiment, and the power supply unit 500 corresponds to the power supply circuit 20 or the composite power supply circuit 25.

  For example, a sensor unit (detection unit) 110, an input operation unit (detection unit) 120, a memory unit 130, a communication circuit unit 140, a display panel 310, and a light source unit 400 are connected to the arithmetic circuit unit 100. ing. Further, at least an input operation unit (detection unit) 220, a memory unit 230, a communication circuit unit 240, a display panel 320, and a light source unit 400 are connected to the arithmetic circuit unit 200. Here, the sensor unit 110 and the input operation units 120 and 220 correspond to the sensors 30, 32, and 36 shown in the above-described embodiments, and the communication circuit units 140 and 240 correspond to the wireless communication circuit 34.

  The arithmetic circuit unit 100 is, for example, an arithmetic circuit (low power, low performance processor) having a relatively low processing capability, and the display panel 310 has a relatively low power consumption corresponding to the processing capability of the arithmetic circuit unit 200. For example, a PN (Polymer Network) type or PD (Polymer Dispersed) type liquid crystal panel that can be displayed and driven is applied. The display panel 310 can be driven and driven with low power consumption. When displaying a clock display, a simple graphic display, an image with a low update frequency of a still image or a screen display, the PN type or the PD type However, the present invention is not limited to such a liquid crystal panel, and a TFT color liquid crystal panel or the like may be applied. On the other hand, the arithmetic circuit unit 200 is, for example, an arithmetic circuit (high power, high performance processor) having a relatively high processing capability, and the display panel 320 corresponds to the processing capability of the arithmetic circuit unit 200 and has a high function display. A TFT color liquid crystal panel or the like that can realize (high-definition still image or moving image color display, visual effect, etc.) is applied. Here, the images displayed on the display panels 310 and 320 are based on image data generated by an application executed in the arithmetic circuit unit 100 or the arithmetic circuit unit 200, and are acquired by the sensor unit 110, for example. The user's exercise information, ecology information, position information, and the like are displayed in a predetermined display form.

  Here, a transmissive display panel is applied to at least one of the display panels 310 and 320 provided in the display unit 300, and the light source unit 400 is disposed as a backlight on the back side thereof. Here, the display panels 310 and 320 may have a configuration in which the display panels 310 and 320 are arranged in parallel or independently without overlapping in plan view when viewed from the user's visual field side. Further, when both the display panels 310 and 320 are transmissive display panels, for example, the display panels 310 and 320 are arranged so as to overlap in a plan view, and have a configuration in which the light source unit 400 is arranged on the rearmost side. There may be.

  The arithmetic circuit unit 100 and the arithmetic circuit unit 200 include a cooperative communication unit 150 and a cooperative communication unit 250, respectively. The arithmetic circuit unit 100 and the arithmetic circuit unit 200 are linked and synchronized with each other by transmitting and receiving a predetermined notification signal between the arithmetic circuit unit 100 and the arithmetic circuit unit 200 via the cooperative communication units 150 and 250. The display state on the display unit 300 (display panels 310 and 320) and the light emission state of the light source unit 400 are controlled.

  As described above, the sensor unit 110 is a variety of sensor units, positioning units, and the like, and at least in the standby mode of the arithmetic circuit unit 100, the sensor unit 110 continues to be turned on by the drive voltage supplied from the power source unit 500, thereby A device that can detect the use state of the DVC and output the detection signal as an interrupt (WKUP) signal to the arithmetic circuit unit 100 is included. Here, the usage state of the electronic device DVC is a specific vibration, impact, inclination, change in position, or the like caused by a user operation, and is detected by, for example, an acceleration sensor.

  The input operation units 120 and 220 are, for example, input means such as button switches, slide switches, and microphones provided in the housing of the electronic device DVC, or input means such as a touch panel disposed on the visual field side of the display unit 300. Various operation signals resulting from user input operations are output to the arithmetic circuit units 100 and 200. The input operation units 120 and 220 continue to be turned on by the drive voltage supplied from the power supply unit 500 at least in the standby mode of the arithmetic circuit unit 100, detect the usage state of the electronic device DVC, and interrupt the detection signal. A signal that can be output to the arithmetic circuit units 100 and 200 as a (WKUP) signal is included.

  The memory unit 130 stores sensor data and the like acquired by the sensor unit 110. The memory units 130 and 230 store data used when executing predetermined control programs and algorithm programs in the arithmetic circuit units 100 and 200, data generated at that time, and the like.

  The communication circuit units 140 and 240 transmit and receive various data and signals between the electronic device DVC and the external device. The communication circuit units 140 and 240 continue to be turned on by the drive voltage supplied from the power supply unit 500 at least in the standby mode of the arithmetic circuit unit 100, and change the usage state of the electronic device DVC based on communication with an external device. It is possible to detect and output the received signal as an interrupt (WKUP) signal to the arithmetic circuit units 100 and 200.

  The light source unit 400 controls the light emission state by the arithmetic circuit unit 100 or the arithmetic circuit unit 200 based on a display state on the display unit 300 (display panels 310 and 320) or a user input operation on the input operation units 120 and 220. Is done.

  The power supply unit 500 includes a battery power supply and the power supply circuit 20 or the composite power supply circuit 25 described above, and is a control signal transmitted from the arithmetic circuit unit 100 or the arithmetic circuit unit 200 via a synchronous serial I / F (not shown). Based on (synchronization signal, command signal), each component performs its function by supplying a predetermined drive voltage to each component described above. Here, as the battery power source, in the portable electronic device DVC, for example, a primary battery such as a commercially available button-type battery or a secondary battery such as a lithium ion battery is applied. In addition to the primary and secondary batteries described above, power sources using energy harvesting technology that generates power using energy such as vibration, light, heat, electromagnetic waves, etc. can be used alone or in combination as a battery power source. You may do.

  In the normal mode, the control method of the electronic device DVC having such a configuration transmits at least the sensor unit 110 and the input operation by transmitting a predetermined control signal from the arithmetic circuit unit 100 or the arithmetic circuit unit 200 to the power source unit 500. A predetermined drive voltage is supplied to the units 120 and 220, the display unit 300, and the light source unit 400. Accordingly, the sensor unit 110 executes a predetermined sensing operation, and the input operation units 120 and 220 monitor the input operation by the user, and output the acquired detection signal to the arithmetic circuit unit 100 and the arithmetic circuit unit 200. The display unit 300 displays images based on the image data generated by the arithmetic circuit unit 100 and the arithmetic circuit unit 200 on the display panels 310 and 320. Here, the arithmetic circuit unit 100 having a low processing capacity performs simple display on the display panel 310, and the arithmetic circuit unit 200 having a high processing capacity performs high-performance display on the display panel 320. At this time, the arithmetic circuit unit 100 and the arithmetic circuit unit 200 cooperate with each other by transmitting and receiving a notification signal via the cooperative communication units 150 and 250 to coordinate the display states of the display panels 310 and 320. The light emission state of the light source unit 400 is controlled. In this operation state, as in the above-described embodiment, the arithmetic circuit unit 100 or the arithmetic circuit unit 200 performs the sensing operation in the sensor unit 110 or the display states of the display panels 310 and 320 (for example, screen display on the display unit 300). The operation mode may be appropriately changed from the normal mode to the stop mode in accordance with the low update frequency).

  Note that in the case of displaying an image on the display unit 300 described above, when the display panels 310 and 320 have a configuration in which the display panels 310 and 320 are arranged in parallel or independently without planarly overlapping, a transmissive display panel ( For example, by irradiating the light of the light source unit 400 from the back side of the display panel 310 and the display panel 320), the screen display of the display panel is projected on the user's visual field side, and various information is visually recognized. When the display unit 300 has a non-transmissive display panel (for example, the display panel 310), the screen display is directly visually recognized by the user. On the other hand, when the transmissive display panels 310 and 320 are arranged so as to overlap in a plane, the light from the light source unit 400 is irradiated from the rearmost side of the display panels 310 and 320. The screen displays of the display panels 310 and 320 are synthesized and projected onto the user's field of view, and are visually recognized by the user as a more sophisticated display.

  The arithmetic circuit unit 100 or the arithmetic circuit unit 200 determines whether the electronic device DVC is not used based on the detection signal output from the sensor unit 110 or the input operation units 120 and 220 and the display state on the display unit 300. When any of the display panels 310 and 320 of the display unit 300 does not display an image for a predetermined time or more, the normal mode or the stop mode is shifted to the standby mode to execute the low power consumption operation. To do. Here, the arithmetic circuit unit 100 or the arithmetic circuit unit 200 transmits a control signal including a specific command signal from the arithmetic circuit unit 100 or the arithmetic circuit unit 200 to the power supply unit 500 prior to the transition to the standby mode. The power supply unit 500 is set to supply a predetermined drive voltage to the sensor unit 110, the input operation units 120 and 220, etc. even after the arithmetic circuit unit 100 or the arithmetic circuit unit 200 shifts to the standby mode. . Thereby, even in the standby mode, the sensing operation by the sensor unit 110 and the operation for monitoring the user input operation by the input operation units 120 and 220 are continued. In the standby mode, when the sensor unit 110 or the input operation unit 120 or 220 detects that the electronic device DVC is used, the arithmetic circuit unit 100 or the arithmetic circuit unit 200 changes from the standby mode to the normal mode. After returning, the above-described operation is executed.

  As described above, in the electronic device DVC according to this application example, the arithmetic circuit unit 100 and the arithmetic circuit unit 200 can display images in various display forms in cooperation with each other, and the electronic device DVC can be displayed. When the use state or the non-display state of the image on the display unit 300 continues, the arithmetic circuit unit 100 or the arithmetic circuit unit 200 shifts to the standby mode and executes the low power consumption operation. Here, in this application example, as shown in the above-described embodiment, even in the standby mode, at least the sensor unit 110 and the input operation units 120 and 220 for detecting the use state of the electronic device DVC are turned on. Set to continue. Thereby, when the use state of the electronic device DVC is detected in the standby mode, the arithmetic circuit unit 100 or the arithmetic circuit unit 200 can be accurately returned to the normal mode. Therefore, according to this application example, regardless of the operation mode of the arithmetic circuit unit 100 or the arithmetic circuit unit 200, a desired function of the electronic device DVC can be performed well, and a significant power saving of the electronic device DVC can be realized. can do.

  The electronic device DVC having the above-described configuration incorporates various sensors, communication functions, and the like (not shown) as shown in FIGS. 6A to 6C, for example, and includes an input operation unit 120 and a display. The present invention can be applied to various devices including the unit 300. Specifically, the electronic device DVC may be a sports watch or a smart watch having a wristwatch type or wristband type appearance as shown in FIG. Further, it may be a smartphone or a mobile phone as shown in FIG. 6B, or a mobile device (for example, a GPS logger or navigator) used outdoors as shown in FIG. 6C.

As mentioned above, although some embodiment of this invention was described, this invention is not limited to embodiment mentioned above, It includes the invention described in the claim, and its equivalent range.
Hereinafter, the invention described in the scope of claims of the present application will be appended.

(Appendix)
[1]
An arithmetic circuit unit that executes a predetermined operation by switching between the first operation mode and the second operation mode in which power consumption is less than that of the first operation mode;
A power supply circuit for supplying a drive voltage to a load based on a control signal output from the arithmetic circuit unit;
Have
The arithmetic circuit unit shifts from the first operation mode to the second operation mode after transmitting the specific control signal to the power supply circuit, and in the second operation mode, the specific control signal Is not output,
The power supply circuit maintains the supply of the drive voltage to the load and operates the load based on the specific control signal while the arithmetic circuit unit is in the second operation mode. A power supply control device characterized in that the state is continued.

[2]
The arithmetic circuit unit is connected to the power supply circuit via a synchronous serial interface,
The specific control signal includes a synchronization signal that synchronizes the arithmetic circuit unit and the power supply circuit, and a command signal that sets a supply state of the drive voltage to the load in the power supply circuit. The power supply control device according to [1], which is characterized.

[3]
The arithmetic circuit unit shifts from the second operation mode to the first operation mode when a specific state is detected by the load in the second operation mode [1]. Or the power supply control apparatus as described in [2].

[4]
The arithmetic circuit unit has a third operation mode for executing the operation with power consumption between the first operation mode and the second operation mode, and the first operation mode and the third operation mode The power supply control device according to any one of [1] to [3], wherein the operation is executed by switching between the operation modes in a predetermined cycle.

[5]
The power supply control device according to any one of [1] to [4], wherein the power supply circuit is a composite power supply circuit that individually supplies the predetermined drive voltage to a plurality of the loads.

[6]
The power supply circuit individually sets the supply state of the drive voltage to the plurality of loads in the second operation mode based on the specific control signal transmitted from the arithmetic circuit unit. The power supply control device according to [5].

[7]
An arithmetic circuit unit that executes a predetermined operation by switching between the first operation mode and the second operation mode in which power consumption is less than that of the first operation mode;
A detection unit for detecting a signal related to a user's input operation;
A power supply circuit that supplies a predetermined drive voltage to the detection unit based on a control signal output from the arithmetic circuit unit;
The arithmetic circuit unit shifts from the first operation mode to the second operation mode after transmitting the specific control signal to the power supply circuit, and in the second operation mode, the specific control signal Is not output,
Based on the specific control signal, the power supply circuit maintains the supply of the drive voltage to the detection unit while the arithmetic circuit unit is in the second operation mode. An electronic device characterized in that the operation state of the device is continued.

[8]
The arithmetic circuit unit shifts from the second operation mode to the first operation mode when a state related to the user's input operation is detected by the detection unit in the second operation mode. [7] The electronic device according to [7].

[9]
An arithmetic circuit unit that executes a predetermined operation by switching between the first operation mode and a second operation mode that consumes less power than the first operation mode, and a control signal that is output from the arithmetic circuit unit And a power supply circuit for supplying a drive voltage to the load,
After the specific control signal is transmitted from the arithmetic circuit unit to the power supply circuit, the arithmetic circuit unit is shifted from the first operation mode to the second operation mode to identify the arithmetic circuit unit. The control signal is not output,
Based on the specific control signal, while the arithmetic circuit unit is in the second operation mode, the operation state of the load is maintained by supplying the drive voltage from the power supply circuit to the load. The control method of the power supply control device characterized by continuing.

[10]
[9], wherein the arithmetic circuit unit is shifted from the second operation mode to the first operation mode when a specific state is detected by the load in the second operation mode. A control method of the power supply control device described.

[11]
A computer including an arithmetic circuit unit that performs a predetermined operation by switching between a first operation mode and a second operation mode that consumes less power than the first operation mode,
Based on the control signal output from the arithmetic circuit unit, after causing the power supply circuit that supplies the drive voltage to the load to transmit the specific control signal, the arithmetic circuit unit is moved from the first operation mode to the first operation mode. 2 to make the arithmetic circuit unit not to output the specific control signal.
Based on the specific control signal, while the arithmetic circuit unit is in the second operation mode, the operation state of the load is maintained by supplying the drive voltage from the power supply circuit to the load. A control program for a power supply control device, characterized in that

[12]
[11], wherein the arithmetic circuit unit is shifted from the second operation mode to the first operation mode when a specific state is detected by the load in the second operation mode. A control program of the power supply control device described.

DESCRIPTION OF SYMBOLS 10 Arithmetic circuit part 20 Power supply circuit 25 Composite power supply circuit 30, 32, 36 Sensor 34 Wireless communication circuit 100, 200 Arithmetic circuit part 110 Sensor part 120, 220 Input operation part 140, 240 Communication circuit part 150, 250 Cooperation communication part 300 Display unit 310, 320 Display panel 400 Light source unit 500 Power supply unit DVC Electronic device

Claims (12)

An arithmetic circuit unit that executes a predetermined operation by switching between the first operation mode and the second operation mode in which power consumption is less than that of the first operation mode;
A power supply circuit for supplying a drive voltage to a load based on a control signal output from the arithmetic circuit unit;
Have
The arithmetic circuit unit shifts from the first operation mode to the second operation mode after transmitting the specific control signal to the power supply circuit, and in the second operation mode, the specific control signal Is not output,
The power supply circuit maintains the supply of the drive voltage to the load and operates the load based on the specific control signal while the arithmetic circuit unit is in the second operation mode. A power supply control device characterized in that the state is continued. The arithmetic circuit unit is connected to the power supply circuit via a synchronous serial interface,
The specific control signal includes a synchronization signal that synchronizes the arithmetic circuit unit and the power supply circuit, and a command signal that sets a supply state of the drive voltage to the load in the power supply circuit. The power supply control device according to claim 1, wherein:   The arithmetic circuit unit shifts from the second operation mode to the first operation mode when a specific state is detected by the load in the second operation mode. Or the power supply control apparatus of 2.   The arithmetic circuit unit has a third operation mode for executing the operation with power consumption between the first operation mode and the second operation mode, and the first operation mode and the third operation mode 4. The power supply control device according to claim 1, wherein the operation is executed by switching between the operation modes at a predetermined cycle. 5.   5. The power supply control device according to claim 1, wherein the power supply circuit is a composite power supply circuit that individually supplies the predetermined drive voltage to a plurality of the loads. 6.   The power supply circuit individually sets the supply state of the drive voltage to the plurality of loads in the second operation mode based on the specific control signal transmitted from the arithmetic circuit unit. The power supply control device according to claim 5. An arithmetic circuit unit that executes a predetermined operation by switching between the first operation mode and the second operation mode in which power consumption is less than that of the first operation mode;
A detection unit for detecting a signal related to a user's input operation;
A power supply circuit that supplies a predetermined drive voltage to the detection unit based on a control signal output from the arithmetic circuit unit;
The arithmetic circuit unit shifts from the first operation mode to the second operation mode after transmitting the specific control signal to the power supply circuit, and in the second operation mode, the specific control signal Is not output,
Based on the specific control signal, the power supply circuit maintains the supply of the drive voltage to the detection unit while the arithmetic circuit unit is in the second operation mode. An electronic device characterized in that the operation state of the device is continued.   The arithmetic circuit unit shifts from the second operation mode to the first operation mode when a state related to the user's input operation is detected by the detection unit in the second operation mode. The electronic apparatus according to claim 7. An arithmetic circuit unit that executes a predetermined operation by switching between the first operation mode and a second operation mode that consumes less power than the first operation mode, and a control signal that is output from the arithmetic circuit unit And a power supply circuit for supplying a drive voltage to the load,
After the specific control signal is transmitted from the arithmetic circuit unit to the power supply circuit, the arithmetic circuit unit is shifted from the first operation mode to the second operation mode to identify the arithmetic circuit unit. The control signal is not output,
Based on the specific control signal, while the arithmetic circuit unit is in the second operation mode, the operation state of the load is maintained by supplying the drive voltage from the power supply circuit to the load. The control method of the power supply control device characterized by continuing.   10. The arithmetic circuit unit is shifted from the second operation mode to the first operation mode when a specific state is detected by the load in the second operation mode. A control method of the power supply control device described. A computer including an arithmetic circuit unit that performs a predetermined operation by switching between a first operation mode and a second operation mode that consumes less power than the first operation mode,
Based on the control signal output from the arithmetic circuit unit, after causing the power supply circuit that supplies the drive voltage to the load to transmit the specific control signal, the arithmetic circuit unit is moved from the first operation mode to the first operation mode. 2 to make the arithmetic circuit unit not to output the specific control signal.
Based on the specific control signal, while the arithmetic circuit unit is in the second operation mode, the operation state of the load is maintained by supplying the drive voltage from the power supply circuit to the load. A control program for a power supply control device, characterized in that   12. The arithmetic circuit unit is shifted from the second operation mode to the first operation mode when a specific state is detected by the load in the second operation mode. A control program of the power supply control device described.

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